The IPNG interface is designed to configure output files to be saved in PNG format.
Properties
Enum ColorSpace
Defines the bit depth of the resulting image measured as the number of bits representing each pixel. It is both readable and writable.
Constant
Value
Description
CS_BLACKWHITE
1
Black and white image (1 bit per pixel)
CS_16COLORS
4
Color image, 16 colors (4 bits per pixel)
CS_16GRAYSCALE
132
Grayscale image (16 hues, 4 bits per pixel)
CS_256COLORS
8
Color image, 256 colors (8 bits per pixel)
CS_256GRAYSCALE
136
Grayscale image (256 hues, 8 bits per pixel)
CS_TRUECOLOR
24
True color image (24 bits per pixel)
Integer Compression
Defines the resulting image's degree of compression. The greater it is, the smaller the output file, and the longer the conversion process. Valid range: between 0 and 9. It is both readable and writable.
Enum Smoothing
Defines the dithering mode applied to half-tone transitions and used to reduce stepwise rendering when representing downsampled images. Dithering is applied only if the ColorSpace property has one of the following values: CS_BLACKWHITE, CS_16COLORS, CS_16GRAYSCALE, CS_256COLORS. It is both readable and writable.
Constant
Value
Description
SM_HQ
1
High-quality dithering is enabled to optimize for output image quality
SM_FAST
0
Fast dithering is used to optimize for conversion speed
Examples
Visual Basic 6
Dim objUDC As IUDC
Dim itfPrinter As IUDCPrinter
Dim itfProfile As IProfile
Set objUDC = New UDC.APIWrapper
Set itfPrinter = objUDC.Printers("Universal Document Converter")
Set itfProfile = itfPrinter.Profile
' Set PNG as current output file format
itfProfile.FileFormat.ActualFormat = FMT_PNG
itfProfile.FileFormat.PNG.ColorSpace = CS_GRAYSCALE_16
itfProfile.FileFormat.PNG.Smoothing = SM_HQ
itfProfile.FileFormat.PNG.Compression = 5
